Dish mop



March 3, 1964 T. BEUMKES 3,122,768

DISH MOP Filed May 10. 1962 2 Sheets-Sheet l F/ G. .Z F/ G 3 \"`IO 'fzli 7/ 4. IIH' INVENTOR.

TEUNlS BEUMKES BY i Zim @Wl 4M/t JM I ATTORNEY March 3, 1964 T. BEUMKl-:s 3,122,768

DISH MOP Filed May 1o, 1962 2 sheets-sheet 2 INVENTOR TEUNIS BEUM KES TTORNE'Y' United States Patent O 3,122,768 DlSH MOP Tennis Beumkes, Arnheim, Netherlands, assignor to Algemene Kunstzijde Unie, NN., Arnhem, Netherlands, a

corporation of the Netheriands Y Fiied May 10, 1962, Ser. No. 193,736 Claims priority, appiication Netherlands May 12, 1961 3 Claims. (Si. 15-244) This invention relates to mops of the type which have one or more rosette-shaped bodies of spongy material fastened at the end of a handle and to the cutting of such rosette-shaped bodies from a large sheet of sponge-like material under waste-free conditions.

It is known in the art to make dish mops out of spongelille eiastic material such as sponge rubber and regenerated cellulose. These materials are cut in various shapes and are fastened to the end of a handle. In general it is desirabie to have the spongy bodies present a somewhat irreguiar surface so that mechanical scrubbing action can be achieved.

One of the most desirable shapes to use for the manufacture of mops of this type, particularly for washing dishes, is a rosette cut from a sheet of suitable spongy plastic material. Heretofore, these rosettes have been cut so that the resulting profile provides a number of projecting arcuate scrubbing surfaces. While mops made from these do a good scrubbing job, a disadvantage of such rosettes is that in cutting them from a sheet of the plastic sponge there is a Very considerable amount of waste.

It is therefore an object of this invention to provide a rosette of novel shape which will retain the scrubbing advantages of the prior art but which may be cut from a sheet of sponge material with negligible waste.

Other objects and advantages of this invention will be apparent upon consideration of the following detailed description of a preferred embodiment thereof in conjunction with the annexed drawings wherein:

FGURE l is a view of a dish mop constructed in accordance with the principles of the present invention with the sponge head in cross-section;

FIGURE 2 is a top pian View of a group of four rosettes cut in accordance with the teachings of the present invention showing how they interit to minimize waste;

FEGURE 3 is a schematic View showing the method of calculating the rosettes of the present invention for minimizing waste; and

FGURE 4 is a sectional view taken along line 4 4 of FIGURE l in the direction of the arrows.

Referring now to FGURE l, the mop there shown consists of three rosettes 1, 2 and 4, suitably supported in a mutually offset manner on the end of a handle 17. These rosettes may be cut from a small sheet of spongy material and when this is done cutting dies are so arranged that each rosette, while of the same shape as every other rosette, is disposed on the sheet at an angular position 90 away from the adjacent rosettes. Each rosette includes four rounded corners 5, 7, 3 and 1t), two outwardly curving sides 6 and 9, and two inwardly curving sides 11 and 12, and a center hole to receive a stud or the like which connects them to a handle. As can be seen in FIGURE 2, the contours of adjacent rosettes are rotated relative to each other a quarter of a turn so that always one of the outwardly projecting sides or prouberances nts in an inwardly curving side of an adjacent rosette. it is this arrangement on the sheet that gives rise to the saving of material.

ln FIGURE 3 the numeral 13 refers to the square which is the basic shape from which the rosette is cut. Let us assume for a dish mop that the sides of this square are 6 3,122,768 Patented Mar. 3, 1964 centimeters. The corners 5, 7, 8 and 10 are rounded olf in the form of semicircles.

Between the arcs of circles 5 and 7 and the arcs of circles '8 and 1% there tit the semi-circles 6 and 9 respectively, which semi-circles represent the circumferences of the outwardly curving sides.

The arcs of circles 5 to 10 inclusive have an equal radius 15, their centres lying on a common circle having a radius 14.

The radius 14 is times the side of the square 13.

The radius 15 is times the side of the square 13.

The arcs of circles 5 and 8, and the arcs of circles 7 and 1t) are curvedly connected respectively by arcs of circles 11 and 12, the radius 16 of which is equal to 2 times the radius 15.

The outwardly curving sides 6 and 9 project beyond the square 13 practically to the same extent as the inwardly curving sides 11 and 12 extend beyond the sides of the square in opposite direction.

It appears that with a proper arrangement of the contours the minimum slit width which remains between the mating outwardly and inwardly curving sides need amount to less than 1% of the length of a side of the square. With the above-described shape of the rosettes the amount of starting material wasted is negligible.

Although the rounded corners and the outwardly and inwardly curving sides may be separated from one another by parts of the sides of the square, it is found that a fuller rosette shape is obtained if the rounded corners and the outwardly and inwardly curving sides are next to one another.

To obtain a well shaped rosette, the symmetry of which moreover permits the rosette-shaped plates to be manufactured in a simple manner, the rounded corners and the outwardly curving sides are, according to the invention, in the form of semi-circles, the centres of which lie on the same circle.

The inwardly curving sides must recede such that an outwardly curving side of another rosette lits perfectly there- 1n.

On the other hand, the inwardly curving side must not be deeper than is necessary, in order to prevent unnecessary weakening of the rosette-shaped plates.

FIGURE 4, a sectional view taken along line 4--4 of FIGURE l, illustrates how the rosettes are assembled in a stack on the handle 17 in an olset manner with protuberance of one rosette directly overlying the inward curve of an adjacent rosette in order to present a maximum number of scrubbing surfaces along the circumference of the mop. in actual practice three or more rosettes, as shown in FIGURE l, would usually be assembled on a single handle in this manner.

What is claimed is:

l. A dish mop which comprises at one end of a handle a plurality of rosettes of a porous, resilient, sponge material, the basic shape of the rosette being substantially a square with rounded corners, two opposite sides each having a single outwardly curved protuberance projecting beyond said basic square and the other two sides each having an inwardly curved portion, the area bounded by each of said inward curves and a portion of said basic square being greater than the area of each protu- Y Y 3 4 berance, said plurality of rosettes being secured to said circles, each of which curvedly inter-connects two rounded handle in an offset manner to form a stack with the procorners of the square.

tuberances of one rosette being opposite the inwardly curved portion of an adjacent rosette. References Cited in the le of this patent 2. A dish mop according to claim 1, characterized in 5 UNITED STATES PATENTS that the rounded corners and the outwardly curved pro- D 186 A97 Arrix NOV 3 1959 tuberances are shaped as semi-circles, the centers of which 834437 Woukg OGL '301 1906 are spaced in arc on diierent radii of the same circle.

3. A dish mop according to claim 1, characterized in FOREIGN PATENTS that the inwardly curved portions are shaped as arcs of l0 503,279 Belgium June 15, 1951 

1. A DISH MOP WHICH COMPRISES AT ONE END OF A HANDLE A PLURALITY OF ROSETTES OF A POROUS, RESILIENT, SPONGE MATERIAL, THE BASIC SHAPE OF THE ROSETTE BEING SUBSTANTIALLY A SQUARE WITH ROUNDED CORNERS, TWO OPPOSITE SIDES EACH HAVING A SINGLE OUTWARDLY CURVED PROTUBERANCE PROJECTING BEYOND SAID BASIC SQUARE AND THE OTHER TWO SIDES EACH HAVING AN INWARDLY CURVED PORTION, THE AREA BOUNDED BY EACH OF SAID INWARD CURVES AND A PORTION OF SAID BASIC SQUARE BEING GREATER THAN THE AREA OF EACH PROTUBERANCE, SAID PLURALITY OF ROSETTES BEING SECURED TO SAID HANDLE IN AN OFFSET MANNER TO FORM A STACK WITH THE PROTUBERANCES OF ONE ROSETTE BEING OPPOSITE THE INWARDLY CURVED PORTION OF AN ADJACENT ROSETTE. 